docs: def post_id_backpage_groups():
    """
    Get a dictionary of Backpage city names mapped to their posting ID group (ex: groups['buffalo']: 'upstateny')
  
    Returns:
      dictionary of Backpage city names mapped to their posting ID group
    """
    city_bp_groups = {}
    with open('dataFiles/city_bp_groups.csv', 'rU') as csvfile:
      reader = csv.reader(csvfile, delimiter = ',')
      for row in reader:
        city_bp_groups[row[0]] = row[1]
  
    return city_bp_groups